The specifications for the PIPO U1 state it is compatible for an SDCard maximum of 32GB. I purchased a SanDisk 32GB MicroSD Class 4. It was then loaded with .avi movie files using my WinXP computer. When inserted in the U1, it was recognized, but would not allow any of the movie files to be played using the standard PIPO Video player or the more advanced Mobo Video Player Pro from the Play Store. I wonder if anyone else has experienced this problem and whether it might be solved by using a class 10 SDCard?